GE Jiang hua, WANG Yan, WANG Ya ping, et al. A Weak Signal Detection Method for Bearing Based on QGA and Stochastic Resonance[J]. 2020, 25(3): 94-101.
GE Jiang hua, WANG Yan, WANG Ya ping, et al. A Weak Signal Detection Method for Bearing Based on QGA and Stochastic Resonance[J]. 2020, 25(3): 94-101.DOI: 10.15938/j.jhust.2020.03.015.
Abstract:Aiming at the problems that the vibration signal is weak and the SNR is low in its early failure stage of rolling bearing
a weak signal detection method combining Quantum Genetic Algorithm (QGA) and Stochastic Resonance is proposed
which improves SNR and identifies fault location. Firstly
the large parameter signal is scale transformed and the noise intensity is estimated according to the input signal to realize the initialization of the parameters. Secondly
the output SNR is selected as the objective function
and the two parameter are dealt with adaptive optimization through the QGA; Finally
the SNR of weak signal is improved by stochastic resonance system. Simulation and experimental results show that the method fully considers the interaction between system parameters
and can effectively improve SNR
and achieve early detection of weak signal in failure stage.